Live Verified Airline Offers: Seattle (SEA) to London (LHR)
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Departure & Arrival Airport Terminal Breakdown (SEA → LHR)
Departing from Seattle-Tacoma International Airport (SEA)
- Terminal Layout: Main Central Terminal (Concourses A, B, C, D) + North (N) & South (S) Satellites
- Major Airlines at SEA: Alaska Airlines (Primary Hub), Delta Air Lines (Transpacific Hub), Korean Air, ANA, Japan Airlines, EVA Air
- Ground Transit to SEA: Sound Transit Link Light Rail 1 Line runs every 8–10 minutes from the parking plaza skybridge to Pioneer Square & Westlake Center in 35 minutes.
Arriving at London Heathrow Airport (LHR)
- Terminal Layout: 4 Active Passenger Terminals (T2 Star Alliance, T3 Oneworld/Virgin/Delta, T4 SkyTeam/Gulf, T5 British Airways)
- Major Airlines at LHR: British Airways (T5/T3 Hub), Virgin Atlantic (T3 Hub), American, United, Delta, JetBlue, Emirates, Qantas
- Airport-to-City Transit at London: Heathrow Express runs non-stop to London Paddington in 15 minutes; Elizabeth Line reaches Bond Street (Mayfair) in 32 minutes and Liverpool Street in 39 minutes.
Frequently Asked Questions: Flying from Seattle to London
How long is the flight from Seattle (SEA) to London (LHR)?
The great-circle flight distance between Seattle-Tacoma International Airport (SEA) and London Heathrow Airport (LHR) is 4,786 miles (7,702 km), with an estimated nonstop block flight time of approximately 10h 05m.
Which terminals do flights from SEA to LHR use?
At Seattle (SEA), flights operate across Main Central Terminal (Concourses A, B, C, D) + North (N) & South (S) Satellites. Upon arrival at London (LHR), passengers use 4 Active Passenger Terminals (T2 Star Alliance, T3 Oneworld/Virgin/Delta, T4 SkyTeam/Gulf, T5 British Airways) with ground transit via: Heathrow Express runs non-stop to London Paddington in 15 minutes; Elizabeth Line reaches Bond Street (Mayfair) in 32 minutes and Liverpool Street in 39 minutes.
How do I check live fares and exact baggage inclusions for SEA to LHR?
Use the live flight table on this page or click "Search Live SEA → LHR Flights" to query real-time airline inventory, exact carry-on and checked bag counts, and instant airline PNR ticketing.